body {
    background: #fff;
    padding: 20px;
    font-family: Helvetica;
  }
  
  #app {
    background: #fff;
    border-radius: 4px;
    padding: 20px;
    transition: all 0.2s;
  }
  
  li {
    margin: 8px 0;
  }
  
  h2 {
    font-weight: bold;
    margin-bottom: 15px;
  }
  
  del {
    color: rgba(0, 0, 0, 0.3);
  }